Portable isolation power supply



FIG. 1 is a top front perspective view of a portable isolation power supply showing my new design;

FIG. 2 is a top rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a rear elevation view thereof.

The broken lines in the figures depict portions of the portable isolation power supply which form no part of the claimed design. 

CLAIM The ornamental design for a portable isolation power supply, as shown and described. 